support for appendonly mode no, always, everysec

1 files changed, 17 insertions, 0 deletions

diff --git a/redis.conf b/redis.conf
index fac5ba605..610049ef9 100644
--- a/redis.conf
+++ b/redis.conf
@@ -124,6 +124,23 @@ databases 16
 
 # appendonly yes
 
+# The fsync() calls tells the Operating System to actually write data on disk
+# instead to wait for more data in the output buffer. Some OS will really flush 
+# data on disk, some other OS will just try to do it ASAP.
+#
+# Redis supports three different modes:
+#
+# no: don't fsync, just let the OS flush the data when it wants. Faster.
+# always: fsync after every write to the append only log . Slow, Safest.
+# everysec: fsync only if one second passed since the last fsync. Compromise.
+#
+# The default is "no" since it's faster and anyway safer than snapshots from
+# the point of view of durability of the latest records modified.
+
+appendfsync no
+# appendfsync always
+# appendfsync everysec
+
 ############################### ADVANCED CONFIG ###############################
 
 # Glue small output buffers together in order to send small replies in a